Shifting mechanism for valve-gears.



K. RUSHTON.

SHIFTING MECHANISM FOR VALVE GEARS.

APPLICATION FILED MAR. II, I9I5.

Patented May 25, 1915.

THF NORRIS PETERS CO. PHOTO-LITHCL, WASHINGTON, 0. c.

UNITEU TAT FATE @FIC KENNETH BUSHTON, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNOR TO THE BALDWIN LOOOIVIOTIVE WORKS, OF PHILADELPHIA,PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

SHIF'IING MECHANISM FOR VALVE-GEARS.

1,1ALOO8.

Application filed. March 11, 191 5.

To all whom it may concern Be it known that I, KENNETH RUsrrroN, acitizen of the United States, residing in Philadelphia, Pennsylvania,have invented certain Improvements in Shifting Mechanism forValve-Gears, of which the following is a specification.

This invention relates to certain improvements in the shifting mechanismfor valve gears of the type known as Walschaerts valve motion.

The object of the invention is to construct the shifting mechanism insuch a manner that it can be applied to any type of locomotive,particularly the type in which the boiler is set low, without disturbingthe alinement. This shifting mechanism can be used in connection withthe standard type of valve gear without altering the position of themain parts thereof.

In the accompanying drawing: Figure 1, is a side view of sufficient of alocomotive to illustrate my invention; and Fig. 2, is a perspective viewof the shifting mechanism.

Referring to the drawing, 1 is the cylinder of the locomotive.

2 is the valve chest.

3 is the boiler.

4: is the main driving wheel, shown by dotted lines.

5 is a pin on the wheel or on a crank secured to the axle 6.

7, 7 are the guides for the cross head 8, which is attached to thepiston rod 9 in the usual manner.

10 is a valve stem attached to a block 11 to which the lever 12 ispivotally connected. The long arm of the lever is connected by a link 13to the cross head 8, while the other arm of the lever is connected to aradius bar 14; carrying a block 15 which is vertically adjustable in thesegment 16, which is pivoted at 16 to a beam 23 secured to the mainframe 24 of the locomotive. An arm 17 on the lower end of this segmentis connected by a rod 19 to a pin 20 on the crank 21 secured to the pin5 on the driving wheel 4:. Heretofore, when the valve gear was used on alocomotive having a low set boiler, the shaft would have to be distortedin order to clear the boiler.

22 is the reverse ings 23" on the beam from this reverse shaft shaftadapted to bear- 23, and projecting is an arm 22 to Specification ofLetters Patent.

Patented May 25, 1915.

Serial No. 13,770.

which is attached the operating rod 25 leading to the cab of thelocomotive. On each end of the reverse shaft 22, as clearly shown inFig. 2, is a lifting arm 26, and mounted in bearings 27 at each side ofthe locomotive, in the present instance above the bottom line of theboiler, is an arm 28 having trunnions 29 adapted to the said bearings 27and, in the present instance, this arm is forked and two links areconnected to the arm. One link 30 is attached to the outer end of thearm 26 and the other link 31 is attached to the bar 141, which is alsoforked, in the present instance, to span the segment 16. The arm 28 andthe arm 26 may be of any length desired and the links 30 and 31 may beconnected to the arm 28 at any point desired.

By this construction, it will be seen that the pivoted member 28, whichis connected to the bar 14 by the link 31, is pivotally mounted at apoint above the bottom line of the boiler. The link 80 can be of anylength desired so as to allow the reverse shaft 21 to pass under theboiler and clear of the other elements of the locomotive.

I claim:

1. The combination of a reverse shaft; an arm thereon; means for turningthe reverse shaft; an arm pivoted to a fixed point above the reverseshaft; a link connecting the two arms; a radius bar; a link connectingthe radius bar with the said pivoted arm; a cross head and a valve rodconnected to the bar; and a segment for controlling the movement of thebar and regulating the movement of the valve rod.

2. The combination in shifting mecha nism for valve gears, of a reverseshaft extending under the boiler of a locomotive; means for turning saidshaft; a lifting arm on the shaft at each side of the locomotive; an armpivoted at a point above the reverse shaft at each side of thelocomotive; a link connecting each arm with the lifting arm on thereverse shaft; a second link attached to each of the pivoted arms and tothe radius bar pivotally mounted on each side of the locomotive; asegment controlling the movement of the bar; and means connecting thebar with a valve rod and a cross head at each side of the locomotive.

3. The combination in shifting mechanism for locomotive valve gears, ofthe main frame of a locomotive; a bearing framelsej th e rever se shaft;linksconnecting the said cured thereto at each side of the locomotive;arms with the last mentioned arms; and 15 a boiler; a reverseshaft-extending under the links connecting the radius bars Withtheboiler and mounted in bearings on the said lastment-ioned arms at apoint beyond the bearing frame; a segment pivoted to each firstmentioned links.

bearing frame; means for moving said seg- In testimony whereof, I havesigned my ment from a driving Wheel; a bar at each name to thisspecification, in the presence of 20 side controlled by the abovementioned seg two subscribing Witnesses.

ments; a cross head and a valve rod; a lever connecting the crosshead-,valve rod and I a KENNETH RUSHTON' radius bar; an arm at each sideof the loco- Witnesses:

motive mounted in the. bearingframes above IRvIN M. PFEIFFEB, V

the reverse shaft; an arm at each end of CHARLES E. RoB-msoN.

copies 0! t is Paten ma be mammrox five cents east, byad msins he enietoner; Benet- V waamngtonillifia"

